Nearly 20 unreleased J Dilla instrumentals will be the focus of 'Motor City,' a collection of the producer's work curated and sequenced by his mother.

Nearly 20 unreleased J Dilla instrumentals will be the focus of Motor City, a collection of the late producer’s work curated and sequenced by his mother, Maureen “Ma Dukes” Yancey.

The compilation serves as both a tribute to Dilla’s native Detroit as well as “letter” from Ma Dukes to her son; accordingly, the CD and vinyl copies of the album are packaged in a limited-edition mailing envelope with a handwritten letter from Ma Dukes to Dilla inside.

In addition to the 19 unheard instrumentals on Motor City, Beat Junkies founder and Dilla’s friend J Rocc has created blends utilizing the instrumentals found on the posthumous release. In the first sample of that digital-only free download that accompanies Motor City purchases, J Rocc combines a bouncy Dilla instrumental with Notorious B.I.G.’s “Juicy.”